All exhaust tubing is sized by O.D. not by I.D. so that would make the tubing I.D. of the round port Tri-Ys close to 1-5/8”.
__________________
1964 Tempest Coupe LS3/4L70E/3.42
1964 Le Mans Convertible 421 HO/TH350/2.56
2002 WS6 Convertible LS1/4L60E/3.23
|